Centering perforator punch with interchangeable punches



Patented Sept. 30, 1952 2,612,222

um'rw STATES PATENT GEwBEmM-t B113 1 i ftil l t lifoit BUNQH I I EETELQ MNQ PE UN H EMS;

George-Q; Stet-ligand EdwardG'. Sterba, Western springsilll;

Our invention elh s p hollow. growls; nihihe elemental struqt l'e with, fil l d forators or punches, which are preferably, used by a xna l-iet'or I r rrie 1;.

to out soft e a hehrubber. ardb ar suher t ec ive ew qijefl piioh lmer etc. ter ol, such. t e ther fiil? l ll ch' d, Shh-W he Ah m an bie t f our. t, to 5 vhri ue izei hphh gi 'wh ii m 9 provide a v fi ea o emeht hmc imate: th rh vv h.v he. ht mhhh z hh of wi which is p ded w thpi t mhemz hq t QXR i' JQ QtQI mea E 5 5. an rhi ilhti V w howin a re rnentory portion of: the body; the l pi'loty' they nornher'ojperforated bii-eh" "sor= hesfliffiieh may be; intercha ngeoibiy spoofed" iff'sil 'irietioiigl p t th sett got he tammt he re section oicente 1 ine.s flan, open tobfi or perforatedtsothatthe, oomph? 1 and concentric with the. co t A ot er mpor nt QJQJ'S QE H to provide a deizlceoi the oijorein, acter which is proizigi efili ith. punches of varied, sizes, ondoimensi v r the same. may be interchangeably attgcheg; to may be handled. and held-firmlytthe's'gid booty I the body of the device. being-provided wit-ha beveled'portion 8 $o 'tl iat A furthe object loaf .in Qti n 1 fig 9307 the same will not be deformed or' 'pene'd by the retlining manner thereto.

Referring to the vario s generally designated 6; do consists of a" cyIi-ndrical boozy"! which is 'suitaJob' knurled sotlfi't't it views; oui inventi on 1s i hollow n peri ro eci. h i whim"W1 ;h l idi ffli pq which is r und n ern ll with at c, tersunl; A blindbore 9 isprovided at the lower-"exsection at its cutting portion that the, seine tremltr thereofahd o h eq bmay be sharpenedor re liqllml; wit

ing the diametral magnitudeth Z6, A further object of our inve n I v t v de ux liary man'pula ed means W th 9; h i g*l t used to reject any scrap material that a y lodge bly mo'llhted dll ed outwardlyby thejst i ifljlg i' gqy st i t o i t e great part of thelength -"th body- 1; the hogij'r 1" halving 'a r'edl ced Shoulder portion l6" at the l wer t'eir iimi t er of:

itself Within. m .m sv i h hw i i is. flh f m h l e tion of the said bushing m e An' longateq SlottedportionW l- 'i'sprovideiin lodged f y he e lf mt. ht lew iit 'ei t e t p of hecntt llgmrti h 1- and w r l 19m he v =i tt.ih ;.5 5; in i. Thfiih lhchfie f hh t hr A further object of our'inv ntion is to pro- Eachpunchjei ch Er k-eff t Eh vicle collar m ans a so laieowiih. the salt iillq is, i; *rov id withobo and gauging means in order to attii tq t e some r lq al y and en age ii for rejection of materigtl'tooe dislodged from the A counterbor-eii- {pp ti p r r or cu tin inth he, he. mea t 4 hemmed h rtiq fi Other objects and a qve ntegee manic g ve. giple edge thereof is; rov; by our enton will be readil uhqhtstqsislth t ng e g 3- 7 those li th th art h reiet encq t the Th i'p l 3 is roideo wi h; e o al t m accompanyin drawings and, the cieeoription II, the point thereof pein -il e'd to tion forming a pa t of the a pl ation 5 h de ite tome t ly 5 the f j i fe ie o in which like, symbols are uaesl to. tl etienote li se an p h 21 ,25, Q1? '21 the 9 lgh llht parts, and i ich 'h he i hel 3: 2-

i 1 is a front. v ew o olio txn. Qt ihv lltiqh e bus n means 19 M e .t .1 .ii he ut: i in order to m re cl ar y illu trate the. 49m- 0 il 9 5 .3 new b i rhlm Q th h 'e'o. 9r.- po e ts hereol v 9 f Fig. 2 is a. top view lookin .slhi ttl h o t will be home that the p r meter arrows 2-2 on Fig.- 1.. in s. ia hohes 8 end 1 0' are pr iiii ii'i'zee Fig. 3 is an eiei?ai liohai m mo: our 1 1 91 't ti 'wi h b e 9 a d't fwh qh are a pteo w r n parts thereof broken it} w: ht i f lit fl h m iih showin also n QOUQQQIHEQ .ihoilementr-i .9? F? fit'fi'i'chohallyi interchangeably hi l Wm 7 ably with respect to the reduced shoulder portion I6 of the body 1.

The advantages to be derived from this particular instrumentality are that the cutting edge may be maintained Another advantage to be derived is that the same instrumentality may be utilized for cutting varied sizes, depending on the numslidably mounted on the said body, shoulder screw means securing the said collar means to the upper portion of the said pilot locating and centering means, and cylindrical perforator bushing means provided with a bored portion securable interchangeably to the said reduced shoulder portion.

reduced shoulder portion.

8. Centering periorator means, comprising a body element provided with a. pounding extension and further provided with 4 4. Centering perforator means, comprising a body element provided with a pounding extension 5. Centering perforator means, comprising a body element provided with a pounding extension v further provided with a reduced shoulder portion at the opposite end thereof, the said reduced shoulder portion having an axial bore exchamfered portion without altering the cutting dimension thereof.

6. Centering perforator body element provided with and further providedv with portion at the means, comprising a a pounding extension a' re tering portion, element merging with the said bore, collar means slidably mounted on the said body,

element merging with the said bore, collar means slidably mounted on the said body, shoulder screw means securing the said collar means to the upper portion 01 the said pilot locating and centering means, cylindrical periorator bushing means provided with a bored portion securable interchangeably to the said reduced shoulder portion, and spring means confined in the said bore between the bottom of the said bore and the top of the said pilot locating and centering means normally urging the said conical centering portion to extend beyond the said perforator bushing means, the said perforator bushing means being provided with a counterbored portion terminating in an interiorly chamfered portion to form a cutting edge which may be sharpened by grinding the said chami'ered portion without altering the cutting dimension thereof.

8. Centering perforator means, comprising a body element provided with a pounding extension and further provided with a reduced shoulder portion at the opposite end thereof, the said reduced shoulder portion having an axial bore extending partly into the said body element, pilot locating and centering means slidably mounted in the said bore and provided with a conical centering portion, slotted means in the said body element merging with the said bore, collar means slidably mounted on the said body, shoulder screw means securing the said collar means to the upper portion of the said pilot locating and centering means. cylindrical perforator bushing means provided with a bored portion securable frictionally and interchangeably to the said reduced shoulder portion, and spring means confined in the said bore between the bottom of the said bore and the top of the said pilot locating and centering means normally urging the said conical centering portion to extend beyond the said periorator bushing means, the said perforator bushing means being provided with a counterbored portion terminating in an interiorly chamiered portion to form a cutting edge which may be sharpened by grinding the said chamiered portion without altering the cutting dimension thereof.

GEORGE J. STERBA. EDWARD C. STERBA.

REFERENCES CITED UNITED STATES PATENTS Number Name Date 306,413 McArdle Oct. 14, 1884 726,086 McAlpine Apr. 21, 1903 863,909 Evans Aug. 20, 1907 2,145,725 Jamieson Jan. 31, 1939 2,220,923 Trilling Nov. 12, 1940 FOREIGN PATENTS Number Country Date 174,239 Great Britain Jan. 26, 1922 882,340 France Mar. 1, 1943 

